ASTM A 957/A 957M Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
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ASTM A 957/A 957M Document Information:
Title
Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
ASTM International
Publication Date:
Mar 1, 2008
Scope:
This specification covers a group of requirements that are
mandatory for castings produced by the investment casting process
to meet the metallurgical requirements of the following steel
casting specifications issued by ASTM.
This specification also covers a group of supplementary
requirements that may be applied to the above specifications as
indicated therein. These are provided for use when additional
testing or inspection is desired and apply only when specified
individually by the purchaser in the order.
When investment castings are ordered, the requirements stated in
this specification form an integral part of the material
specification. In cases of conflict, the requirements of this
specification shall take precedence over the individual material
specification requirements.
The values stated in either inch-pound or SI units are to be
regarded separately as standard.Within the text, the SI units are
shown in brackets. The values stated in each system are not exact
equivalents; therefore, each system must be used independently of
the other. Combining values from the two systems may result in
nonconformance with the specification. Inchpound units are
applicable for material ordered to Specification A 957 and SI units
for material ordered to Specification A 957M.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- casting
- investment casting
- master heat
- steel
- sub-heat
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